<template>
  <button
    role="button"
    aria-label="Toggle dark/light"
    @click.prevent="toggleTheme"
    class="toggle-theme"
  >
    <svg
      v-if="darkTheme"
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      stroke-width="2"
      stroke-linecap="round"
      stroke-linejoin="round"
      class="feather feather-sun"
    >
      <circle cx="12" cy="12" r="5"></circle>
      <line x1="12" y1="1" x2="12" y2="3"></line>
      <line x1="12" y1="21" x2="12" y2="23"></line>
      <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"></line>
      <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"></line>
      <line x1="1" y1="12" x2="3" y2="12"></line>
      <line x1="21" y1="12" x2="23" y2="12"></line>
      <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"></line>
      <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></line>
    </svg>
    <svg
      v-else
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      stroke-width="2"
      stroke-linecap="round"
      stroke-linejoin="round"
      class="feather feather-moon"
    >
      <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"></path>
    </svg>
  </button>
</template>

<script>
export default {
  data() {
    return {
      darkTheme: false,
    }
  },
  methods: {
    toggleTheme() {
      this.darkTheme = !this.darkTheme
      // This is using a script that is added in index.html
      window.__setPreferredTheme(this.darkTheme ? 'dark' : 'light')
    },
  },
  mounted() {
    if (window.__theme == 'dark') this.darkTheme = true
  },
}
</script>

<style lang="scss">
.toggle-theme {
  background-color: transparent;
  border: 0;
  color: var(--body-color);
  cursor: pointer;
  &:hover {
    opacity: 0.8;
  }
  &:focus {
    outline: none;
  }
}
</style>
